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Q.
What types of
preservatives are used to treat wood?
A.
There are three
main groups of preservatives used by the preservation
industry:
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Timber treated with water-borne
preservatives has a wide variety of applications, both
indoors and outdoors, for residential, commercial, and
industrial structures. Copper Chrome Arsenate (CCA),
Alkaline Copper Quaternary (ACQ), and Copper azole (CuAz)
are the most common water-borne preservatives here in
Australia.
-
Timber treated with oil-borne
preservatives is used primarily for heavy duty
construction and in the marine environment. The most
common oil-borne preservatives are creosote and pigment
emulsified creosote (PEC). Oil-borne treated products
include utility poles, rail sleepers and marine piles
-
Timber treated with Light Organic Solvent
Preservatives (LOSP) includes high value joinery
and similar products. LOSP treated products are treated
generally in their final form and shape and must only be
used out of ground contact. The LOSPs include tributyl
tin naphthenate (TBTN), azoles, and the synthetic
pyrethroids, permethrin, deltamethrin, bifenthrin, and
cypermethrin for termite and insect control
The Australian Standard AS1604 – 2005 series
defines the species and commodities for which these and other wood
preservative systems are suited
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Whilst the TPAA endeavours to ensure that any advice, recommendation, specification or
information it may give is accurate and correct, it cannot accept any liability either
directly or indirectly arising from the use of products or information, whether or not in accordance
with any advice, specification, recommendation or information given.
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